Prioritizing objects in an array based on a variable value?

Hey all, I'm working on a targeting system for some turrets in my game. What I have at moment works fine for the majority of my turrets. It returns a target based on the closest enemy. What I need is a way to prioritize certain enemies to be targeted before the others, unless no priority targets are available in w$$anonymous$$ch case to simply target the closest.

Here's my targeting code at the moment.

 public Transform target;
 public Transform closestenemy;
 public GameObject[] enemies;
 
 public Transform getClosestenemy()
     {
         enemies = GameObject.FindGameObjectsWithTag("enemy");
         float closestenemy = Mathf.Infinity;
         Transform trans = null;
 
         foreach (GameObject go in enemies)
         {
             float currentenemy;
             currentenemy = Vector3.Distance(transform.position, go.transform.position);
             if (currentenemy < closestenemy)
             {
                 closestenemy = currentenemy;
                 trans = go.transform;
             }
         }
         return trans;
     }

I tried sorting the array by adding

 var targetlist = enemies.OrderByDescending(item => item.GetComponent<sc_setpriorityclass>().setClass).ToArray();

and changing the foreach() loop to use t$$anonymous$$s target list array instead. But it doesn't seem to have any effect, and the turrets still simply target the closest enemies.

Any help would be much appreciated thanks!